A touch-sensitive display device includes a display. The data processors of said wind power system are mutually time synchronized. The MFR is used to slowly release tracer compounds into a liquid system. Data from the on-site and off-site servers can be transferred to the computer via the first network connection and the supplemental network connection, respectively. The method includes the steps of: receiving a codec setup message including information regarding a multimedia codec from a switching center; deactivating a decoding function of a voice codec; activating a decoding function of the multimedia codec; receiving the RBT sound sources; and decoding the RBT sound sources through the multimedia codec and reproducing the decoded RBT sound sources.